# Making a Fraction Calculator

TLDRIn this video, the host demonstrates how to create a DIY fraction calculator using two circles divided into 64 equal sections. The project involves marking incremental values, creating a larger circle for the base, and drilling holes for alignment. The host also discusses the process of attaching the two circles with a drive pin rivet and offers tips for using the calculator for both addition and subtraction of fractions. The video concludes with the host sharing a downloadable pattern and encouraging viewers to modify the design to suit their needs.

### Takeaways

- π οΈ The video demonstrates how to make a DIY fraction calculator.
- π The creator used a spoke generator program to divide circles into 64 sections for the calculator.
- β Each section of the calculator represents 1/64th of an inch.
- ποΈ The calculator is marked with incremental values starting from zero and going counterclockwise.
- π² Two circles are required for the project, with the top circle being a quarter inch larger in radius than the bottom.
- π© The calculator is assembled using drive pin rivets to allow the top circle to rotate freely.
- π© A drill press is used to create a precise 5/32 diameter hole for the rivets.
- π¨ The zero point is marked in black for easy identification.
- π The calculator can be used to add or subtract fractions by aligning the desired fraction with the zero mark and rotating.
- π§ A handle was initially included in the design but was found to obstruct the view and was removed.
- π The creator offers a downloadable PDF pattern for the calculator, which can be requested via email.

### Q & A

### What is the main project discussed in the video?

-The main project discussed in the video is making a fraction calculator.

### Why did the host decide to make their own fraction calculator?

-The host decided to make their own fraction calculator because they were unable to find one for sale as it's no longer in production.

### What tool did the host use to divide the circles into 64 equal sections?

-The host used an online spoke generator program to divide the circles into 64 equal sections.

### How does the host mark the starting point on the fraction calculator?

-The host marks the starting point by choosing any one of the sections and marking it as zero.

### What material is used to make the fraction calculator?

-The fraction calculator is made using hardboard, with one wheel using 1/8 inch thick hardboard and the other using quarter inch thick hardboard.

### What is the purpose of the holes marked around the perimeter of the larger wheel?

-The holes marked around the perimeter of the larger wheel are for drilling through holes to allow the two discs of the calculator to be fastened together.

### How are the two discs of the fraction calculator fastened together?

-The two discs of the fraction calculator are fastened together using drive pin rivets.

### How does the host demonstrate the use of the fraction calculator for addition?

-The host demonstrates the addition by resetting the calculator to zero, then spinning the calculator to the desired fractions and stopping at the stop to see the result in the answer window.

### What issue did the host encounter with the handle design of the calculator?

-The host found that the handle design got in the way of the measurements and blocked out the holes, making it impractical for use.

### What alternative fastening method can be used if drive pin rivets are not available?

-If drive pin rivets are not available, a nut and bolt or even a nail can be used as an alternative to fasten the two discs together.

### How can the fraction calculator be modified to include decimal equivalents of fractions?

-The fraction calculator can be modified by making the window on the top circle larger and writing in the decimal equivalent of each fraction on the bottom circle where the window would be extended.

### Outlines

### π οΈ Introduction to Building a Fraction Calculator

The video begins with the host introducing a DIY project to create a fraction calculator, inspired by a similar tool that garnered attention in a previous episode. The original calculator is no longer available, prompting the host to design and build their own version. The project involves creating two circles, each divided into 64 equal sections, to represent fractions. The host suggests using a spoke generator program for precise division and marking the sections incrementally. A mistake in the host's own markings is acknowledged, demonstrating the editable nature of the project. The top circle is slightly larger, with extended lines from the bottom circle's sections to mark points for drilling holes. The zero mark is emphasized with a dark color for clarity.

### π© Constructing the Fraction Calculator's Wheels

The host proceeds to explain the construction of the top wheel of the fraction calculator, which involves marking 64 sections and incrementing values by 1/64th for each section, starting from a chosen starting point. A handle or thumb hole is designed for ease of use, and a cut-out section is planned for the zero mark to serve as a stop during calculations. The host then transitions to material preparation, selecting hardboard for the project. Patterns are adhered to the hardboard using spray adhesive, and the host demonstrates the process of cutting the shapes using a scroll saw, emphasizing the importance of a clean cut for accuracy.

### π© Drilling and Assembling the Fraction Calculator

The video continues with the drilling of 3/32nd diameter holes at the marked points on the larger wheel, using a brad point bit for clean cuts. The host advises caution during this step to avoid damaging the pattern. The top wheel is then aligned with the larger wheel, ensuring the perimeters match, and a 5/32nd hole is drilled through both layers to accommodate a drive pin rivet. The rivet is used to fasten the two discs together, allowing the top wheel to spin freely, completing the assembly of the fraction calculator.

### π Demonstrating the Use of the Fraction Calculator

The host demonstrates how to use the completed fraction calculator, starting with resetting it to zero using the marked dark spot. The calculator is used to add fractions by aligning the desired fraction holes and spinning the top wheel until it hits the stop. The process is shown for adding and subtracting fractions, with the host explaining how to read the results in the answer window. The video also addresses potential modifications, such as adding decimal equivalents to the fractions for additional utility.

### π Conclusion and Call to Action

In the final segment, the host expresses gratitude for the viewers' engagement and interest in the fraction calculator project. They encourage viewers to reach out via email to obtain the detailed pattern for the calculator, offering it as a token of appreciation for the viewers' support. The host also highlights the potential for personal modifications to the design and reiterates the simplicity and utility of the fraction calculator for woodworking and other applications involving imperial measurements.

### Mindmap

### Keywords

### π‘Fraction Calculator

### π‘Spoke Generator Program

### π‘Hardboard

### π‘Scroll Saw

### π‘Drive Pin Rivets

### π‘Imperial Measurements

### π‘Prototype

### π‘PDF Pattern

### π‘Cricket Design Space

### π‘Decimal Equivalent

### Highlights

Introduction to building a fraction calculator.

Using a spoke generator program to divide a circle into 64 sections.

Marking the starting point and numbering each section by 1/64 increments.

Creating a second circle with a larger radius for the top wheel.

Drilling holes for the calculator's operation on the larger wheel.

Designing a stop mechanism to prevent over-rotation of the calculator.

Cutting out a thumb hole for ease of use.

Preparing hardboard material for the calculator's construction.

Applying patterns to hardboard using spray adhesive.

Cutting out the calculator's components using a scroll saw.

Drilling holes for the rivets to fasten the two discs together.

Assembling the fraction calculator using drive pin rivets.

Demonstration of adding fractions using the fraction calculator.

Explanation of subtracting fractions with the calculator.

Discovering a design flaw with the handle obstructing measurements.

Revamping the design to remove the obstructive handle.

Providing an alternative method using a nut and bolt if rivets are unavailable.

Offering a PDF pattern for the fraction calculator upon request.

Encouraging modifications for personal use, such as adding decimal equivalents.

Acknowledging the time and effort put into creating the calculator's pattern.

Invitation for viewers to reach out for the pattern and to join future episodes.

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